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there is two ways to adjust them..the arc they spray, or the distance...here is the instructions to both.
<b></b>Adjusting the Arc
make sure the Dot is lined up at the Right side of the landscape (fixed side) and with a simple twist of the nozzle top with your finger, twist the nozzle until the arc you want is achieved..... Hunter NOzzles are adjustable from 0 deg...to 360 deg.

<b></b>To Adjust Distance
Hold the nozzle top with your finger to prevent it from moving (black top, not colored part) and insert the HUnter Metal hex end into the hex screw at the top of the nozzle....twist it down to reduce the distance, and back up to enlarge the distance....remembe r thou, dont twist it down tooo much because that will create poor results.......HUnter Nozzles are set at the max. radius....if you need to reduce distance, install a smaller nozzle.